Audio Technica ES947 Cardioid wide range fixed charge condenser boundary microphone

This low-profile cardioid condenser boundary microphone is recommended for unobtrusive table-, ceiling-, or panel-mount applications in high-quality sound reinforcement, professional recording and teleconferencing. Designed for permanent installation, the microphone is equipped with a self-contained power module with an XLRM-type output connector, eliminating the need for an external power module. Protected by a rugged all-metal case with a two-layer steel mesh grille, the microphone has a cardioid pattern for enhanced gain before feedback and improved signal-to-noise ratio. It is available in two colors: black (ES947) and white (ES947W).

• Designed for surface-mount applications such as high-quality sound reinforcement, professional recording and teleconferencing
• Low-profile element provides uniform cardioid polar pattern with 120º acceptance angle
• Mounts unobtrusively in table-tops, ceilings and wall panels
• Self-contained power module with XLRM-type output connector
• Rugged all-metal case with a two-layer steel mesh grille
• Isolators provide mechanical dampening of mounting-surface vibration
• Requires 11V to 52V DC phantom power
• UniGuard® RFI-shielding technology offers outstanding rejection of radio frequency interference (RFI)
• Available in two colors: black (ES947) and white (ES947W)
• RoHS compliant - free from all substances specified in the EU directive on hazardous substances

• Element: Fixed-charge back plate, permanently polarized condenser
• Polar Pattern: Half-cardioid (Cardioid in hemisphere above mounting surface)
• Frequency Response: 40-12,000 Hz
• Open Circuit Sensitivity: -42 dB (7.9 mV) re 1V at 1 Pa
• Impedance: 200 ohms
• Maximum Input Sound Level: 142 dB SPL, 1 kHz at 1% T.H.D.
• Dynamic Range: 113 dB, 1 kHz at Max SPL
• Signal to Noise Ratio: 65 dB, 1 kHz at 1 Pa
• Phantom Power Requiremens: 11-52V DC, 2 mA typical
• Weight: 64 g (2.3 oz)
• Dimensions: 69.0 mm (2.72“) long, 30.0 mm (1.18“) diameter
• Output Connector: Integral 3-pin XLRM-type

With three cardioid condenser elements in a single housing, the phantom-powered U843R offers a remarkably versatile tool for surface-mount installations. Levers on the microphone base allow easy reorientation of two elements to offer 360° or 300° coverage. Since elements can be powered and used individually or in any combination, further flexibility is easily achieved. For example, with two elements powered, the microphone can provide a figure-of-eight polar pattern; with a single element powered, the microphone functions as a standard cardioid boundary microphone. Installation and repositioning are extremely quick, thanks to four recessed pathways on the base of the microphone that enable the user to route the cable as required to accommodate any installation requirements; no tools or disassembly are needed. The microphone also offers Audio-Technicaʼs innovative UniGuard® RFI-shielding technology.

• Three cardioid condenser elements mounted in a single housing
• Easily reposition two elements (via levers on the microphone base) to offer 360° or 300° coverage; each element can be powered and used individually or in any combination
• Also functions as a stereo boundary microphone
• Provides full, efficient and flexible coverage—fewer microphones required
• Small-diameter capsules near boundary eliminate phase distortion and deliver clear, high-output performance
• Low-frequency attenuation improves sound pickup without affecting voice quality
• Cable routes through any of four recessed pathways on the microphone base (or down for direct feed through a table surface); no tools or disassembly required
• UniGuard® RFI-shielding technology offers outstanding rejection of radio frequency interference (RFI)
• Heavy die-cast case and non-slip silicone foam bottom pad minimizes coupling of surface vibration to the microphone
• Low-profile design with low-reflectance finish for minimum visibility

• Element: Fixed-charge back plate, permanently polarized condenser
• Polar Pattern: Hemispherical Cardioid x3 (combine to omni-directional or bidirectional)
• Frequency Response: 70-16,000 Hz
• Open Circuit Sensitivity: –37 dB (14.1 mV) re 1V at 1 Pa
• Impedance: 100 ohms
• Maximum Input Sound Level: 134 dB SPL, 1 kHz at 1% T.H.D.
• Dynamic Range (Typical): 105 dB, 1 kHz at Max SPL
• Signal-to-Noise Ratio: 65 dB, 1 kHz at 1 Pa
• Phantom Power Requirements: 11-52V DC, 2 mA typical
• Switch: The lever of elements can adjust the proper position
• Weight (Less Cable): 160 g
• Dimensions: 20.0 mm - height
  85.0 mm – maximum body diameter
• Cable: 7.6 m long (permanently attached to microphone), 4 mm diameter, 6 conductor, shielded cable; output end stripped and tinned for connection to electronic device
• Accessories Furnished: Soft protective pouch

For micing upright and grand pianos on stage or in the studio. Additional applications in the area of conference technology, transmission of roundtable discussions and theatrical performances.

Featuring breakthrough audio and mechanical design innovations, the phantom-powered U851R offers outstanding speech intelligibility and transparent sound quality for surface-mount applications. The microphone is equipped with a PivotPoint® rotating output connector, UniSteep® filter and UniGuard® RFI-shielding technology. It accepts interchangeable condenser elements - available for boundary microphones in cardioid, hypercardioid and omnidirectional polar patterns. With a heavy die-cast case and silicon foam bottom pads to minimize coupling of surface vibration to the microphone, the U851R is equipped with self-contained electronics, eliminating the need for an external power module.

• Designed for surface-mount applications such as high-quality sound reinforcement, professional recording, television, conferencing and other demanding sound pickup situations
• PivotPoint® rotating output connector allows cable to exit from either the rear or the bottom of the microphone
• Superior off-axis rejection for maximum gain before feedback
• UniGuard® RFI-shielding technology offers outstanding rejection of radio frequency interference (RFI)
• Self-contained electronics eliminate need for external power module
• Small-diameter UniPoint® capsule near boundary eliminates phase distortion and delivers clear, high-output performance
• Heavy die-cast case and non-slip silicon foam bottom pads minimize coupling of surface vibration to the microphone
• Low-profile design with low-reflectance finish for minimum visibility
• Available in two colors: black (U851R) and white (U851RW)

• Element: Fixed-charge back plate, permanently polarized condenser
• Polar Pattern: Half-cardioid (cardioid in hemisphere above mounting surface)
• Frequency Response: 30-20,000 Hz
• Low Frequency Roll Off: 80 Hz, 18 dB/octave
• Open Circuit Sensitivity: 34 dB (19.9 mV) re 1V at 1 Pa
• Impedance: 200 ohms
• Maximum Input Sound Level: 134 dB SPL, 1 kHz at 1% T.H.D.
• Dynamic Range: 108 dB, 1 kHz at Max SPL
• Signal to Noise Ratio: 68 dB, 1 kHz at 1 Pa
• Phantom Power Requiremens: 11-52V DC, 4 mA typical
• Switch: Flat, roll-off
• Weight: 9.2 oz (262 g)
• Dimensions: 4.25" (108.0 mm) long, 3.31" (84.0 mm) maximum width, 0.91" (23.0 mm) height
• Output Connector: TB3M-type
• Cable: 25.0' (7.6 m) long, 0.13" (3.2 mm) diameter, 2-conductor, shielded cable with TA3F and XLRM-type connectors